Toshiba TCB-IFMB641TLE Installation Manual page 8

Modbus Interface
Modbus-Master
(Locally procured)
A B
(+) (-)
The shielded wire of the RS-485
communication cable must be earthed
on address 1
CAUTION: RS-485 communication
cables A(+) and B(-) have polarity.
Be careful when connecting the RS-
485 wires.
7-EN
Do not connect the shielded wire of
TCC-LINK communication cable to
the earth.
TCC-LINK U1 and
U2 have no polarity.
RS-485 terminator resistor is set by
Modbus interface of address setting
switch SW1=1 only.
Set the RS-485 terminator resistor on the
address1 unit (Modbus Interface address
SW1=1) and host system. Do not set it here.
TCC-LINK terminator resistor is set on
SW1 the air conditioner side. SW6 should
be OFF.
8
SW5 SW6
SW1
1
SW5 SW6
Set the Modbus Interface address with SW1. Assign 1 to
F(15) to each address to avoid duplication.
CAUTION: The SW1 setting is read when the power is
turned on. Push the reset switch SW7 after changing the
address.
– 7 –
Installation Manual
U4 U3
U4 U3
U2 U1 U2 U1
U2 U1 U2 U1
U2 U1
U4 U3 U4 U3
U2 U1 U2 U1
U2 U1 U2 U1 U2 U1
U4 U3
U4 U3